Box corner



May 13, 1930. B A, LANGE 1,758,230

BOX CORNER Filed Nov. 26, 1926 Amer-{on Patented May 13, 1930 PATENrIBEBTHQLD A. LANGE, OF SI. LOUIS, MISSOURI IBOX CORNER Application filedNovember 26, 1926. Serial No. 150,840.

This invention relates to box-corners or 7 joints in boxes that areformed of pasteboard, fiberboard, strawboard, or similar material. Theinvention has more particular reference 5 to a novel form of flexibleseam that is produced in the material by creasing the same, and on whichthe material can be bent to form a corner for a box.

A further object is to providea seam of such configuration that it canbe creased in the blank of fiberboard or the like with a minimum strainon the material, and will, also,

be sufficiently flexible to permit the stock to be bent readily thereonwithout fracture into box formation.

in the course of the following description of a preferred embodiment ofthe invention.

In the accompanying drawing forming part of this specification, in whichlike numbers of reference denotes like parts wherever they occur:

Figure 1 is an end view of the sheet distended and after it has beenremoved from the dies;

this invention; and 7 Figures 3 and t-areend views which illustrate thepliability of this seam to fiexure in respective opposite directions.

The illustrations depict end views oflaminated fiberboard that has beencreased to define the seam of this invention, but the inven- 7 tion canbe embodied in other suitable sheet material, such, for instance, ascardboard, pasteboard, and the like;

The material is notscored, partly removed,

Figure 2 depictsa box-corner embodying scribed that is bent to define aflexible seam sary for flexibility is gathered into the seam. Thecreased sheet 18 presents the appearance shown in Figure 1, the seamcomprising a pair of comparatively deep adjacent grooves 14 and 15 inthe facej16of the sheet, and a preferably shallower groove 17 in theother face 18 of the sheet intermediary of the groovesl f and 15,whereby an intervening An object of the invention is to provide a V 10seam of the character described which will reridge 19 is presented onthe face 16 that does not rise higher than the plane of the said faceor, betterstill, is disposed in retracted or depressedrelation thereto,because the depression ofthe intermediate portion of ridge 19 of theseam facilitates bending as will be apparent from Figures 2 and S, andthe groove 17 and the width of the ridge 19 facilitate bendingin thedirection exhibited in Figure 4, The bottoms of the grooves 14, 15, and17 can be round or of any other suitable shape,

1 but the bottoms-of thegrooves 14 and 15 are Other objects andadvantages will appear preferably substantially flat to bias the bendingof the fibers thereat so that they readily assume the positions anddirections depicted in Figure 3 when the sheet is bent in thatdirection. V 79 Having thusfully described this invention,

I hereby reserve the benefit of all changes in form, arrangement, order,or useof parts, as

it is evident that many minor changes may .be'made therein withoutdeparting from the spirit of this invention or the scope of thefollowing claims.

Iclaim: r f v i 1. A sheet of material of the character de- I 80comprising, at least, a pair of adjacent, flat-bottomed substantiallysquare-cornered grooves in one face of the material and a ridgetherebetween that presents a comparatively wide and substantially fl'attop face.

2. A laminated sheet of material of the character described that is bentand upset to define a flexibleseam comprising a pair of adjacent'flat-bottomed substantially. squarecornered grooves in one face of thematerial '90 signature.

and a shallower groove inlthe other face of the material intermediary ofthe first-mentioned grooves, there being a ridge produced between saidfirst-mentioned grooves and directly above said shallower groove, saidridge beingwider than the adjaeent'grooves and presenting asubstantially flattened top to fac-ilitate bending of the material.

.In testimony whereof I'hereunto aifix my BERTHOLD A. LANGEIVY

